#define CYCLES  10
//#define RESOLUTION  F_CPU / CYCLES /‭ 2^24 = 0.09536743732496
#define RESOLUTION  0.09536743732496



// ASM
void static inline Signal_OUT(const uint8_t *, uint8_t, uint8_t, uint8_t);


struct signal{
    volatile uint8_t    mode;           //signal
    volatile uint8_t    fr1;            //Frequency [0..7]
    volatile uint8_t    fr2;            //Frequency [8..15]
    volatile uint8_t    fr3;            //Frequency [16..31]
    volatile uint32_t   freq;           //frequency value
    volatile uint8_t    flag;           //if "0"generator is OFF, "1" - ON
    volatile uint32_t   acc;            //accumulator
    volatile uint8_t    ON;
    volatile uint8_t    HSfreq;         //high speed frequency [1...4Mhz]
    volatile uint32_t   deltafreq;      //frequency step value
} SG;

//const uint8_t  sinewave[] __attribute__ ((section (".MySection1"))) = {
static const uint8_t sinewave[] PROGMEM = {
    0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,
    0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8,
    0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf5,
    0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,
    0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,
    0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea,0xe8,0xe6,0xe4,0xe2,0xe0,0xde,0xdc,
    0xda,0xd8,0xd5,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,0xb3,
    0xb0,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x98,0x95,0x92,0x8f,0x8c,0x89,0x86,0x83,
    0x80,0x7c,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x63,0x60,0x5d,0x5a,0x57,0x54,0x51,
    0x4f,0x4c,0x49,0x46,0x43,0x40,0x3e,0x3b,0x38,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,
    0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x13,0x12,0x10,0x0f,0x0d,0x0c,0x0a,
    0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x05,0x06,0x07,0x08,
    0x09,0x0a,0x0c,0x0d,0x0f,0x10,0x12,0x13,0x15,0x17,0x19,0x1b,0x1d,0x1f,0x21,0x23,
    0x25,0x27,0x2a,0x2c,0x2e,0x31,0x33,0x36,0x38,0x3b,0x3e,0x40,0x43,0x46,0x49,0x4c,
    0x4f,0x51,0x54,0x57,0x5a,0x5d,0x60,0x63,0x67,0x6a,0x6d,0x70,0x73,0x76,0x79,0x7c
};

const uint8_t *SIGNALS[] = {
    sinewave
};

void static inline Signal_OUT(const uint8_t *signal, uint8_t ad2, uint8_t ad1, uint8_t ad0)
{
    asm volatile(
        "eor r18, r18   ;r18<-0"    "\n\t"
        "eor r19, r19   ;r19<-0"    "\n\t"
        "1:"                        "\n\t"
        "add r18, %0    ;1 cycle"           "\n\t"
        "adc r19, %1    ;1 cycle"           "\n\t"
        "adc %A3, %2    ;1 cycle"           "\n\t"
        "lpm            ;3 cycles"  "\n\t"
        "out %4, r0     ;1 cycle"   "\n\t"
        "sbis %5, 2     ;1 cycle if no skip" "\n\t"
        "rjmp 1b        ;2 cycles. Total 10 cycles" "\n\t"
        :
        :"r" (ad0),"r" (ad1),"r" (ad2),"e" (signal),"I" (_SFR_IO_ADDR(PORTA)), "I" (_SFR_IO_ADDR(SPCR0))
        :"r18", "r19"
    );
}


// --------------------
    SG.fr1  = 0xe8;
    SG.fr2  = 0x03;
    SG.fr3  = 0x00;

    SG.freq=( ((uint32_t)(SG.fr3)<<16) | ((uint32_t)(SG.fr2)<<8) | ((uint32_t)(SG.fr1)) );

    SG.acc = SG.freq / RESOLUTION;
    Signal_OUT(SIGNALS[SG.mode], (SG.acc >> 16), (SG.acc >> 8), SG.acc);



// ERRORS

Compiling C: main.c
avr-gcc -c -mmcu=atmega324p -I. -gdwarf-2 -DF_CPU=16000000UL -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=./main.lst  -std=gnu99 -Wundef -MMD -MP -MF .dep/main.o.d main.c -o main.o
/tmp/ccCDmZHO.s: Assembler messages:
/tmp/ccCDmZHO.s:317: Error: number must be positive and less than 32
Makefile:579: recipe for target 'main.o' failed
make: *** [main.o] Error 1